//Render SSAO
void RenderSSAO(GraphicsDevice GraphicsDevice, RenderTargetBinding[] GBuffer,
Camera Camera)
{
//Set SSAO Target
GraphicsDevice.SetRenderTarget(SSAOTarget);
//Clear
GraphicsDevice.Clear(Color.White);
//Set Samplers
GraphicsDevice.Textures[1] = GBuffer[1].RenderTarget;
GraphicsDevice.SamplerStates[1] = SamplerState.LinearClamp;
GraphicsDevice.Textures[2] = GBuffer[1].RenderTarget;
GraphicsDevice.SamplerStates[2] = SamplerState.PointClamp;
GraphicsDevice.Textures[3] = randomNormals;
GraphicsDevice.SamplerStates[3] = SamplerState.LinearWrap;
//Calculate Frustum Corner of the Camera
Vector3 cornerFrustum = Vector3.Zero;
cornerFrustum.Y = (float)Math.Tan(Math.PI / 3.0 / 2.0) * Camera.FarClip;
cornerFrustum.X = cornerFrustum.Y * Camera.AspectRatio;
cornerFrustum.Z = Camera.FarClip;
//Set SSAO parameters
ssao.Parameters["Projection"].SetValue(Camera.Projection);
ssao.Parameters["cornerFustrum"].SetValue(cornerFrustum);
ssao.Parameters["sampleRadius"].SetValue(sampleRadius);
ssao.Parameters["distanceScale"].SetValue(distanceScale);
ssao.Parameters["GBufferTextureSize"].SetValue(new Vector2(SSAOTarget.Width,
SSAOTarget.Height));
//Apply
ssao.CurrentTechnique.Passes[0].Apply();
//Draw
fsq.Draw(GraphicsDevice);
}
//Clear GBuffer
void ClearGBuffer(GraphicsDevice GraphicsDevice)
{
//Set to ReadOnly depth for now...
GraphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
//Set GBuffer Render Targets
GraphicsDevice.SetRenderTargets(GBufferTargets);
//Set Clear Effect
Clear.CurrentTechnique.Passes[0].Apply();
//Draw
fsq.Draw(GraphicsDevice);
}
